<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .ci{
            float: left;
            width: 100px;
            height: 150px;
            border: red solid 2px;
        }
    </style>
</head>
<body>

    <div>
        <span>左边</span>
        <span style="float: right">右边</span>
    </div>

    <div style="background-color: blueviolet">
        <div class="ci"></div>
        <div class="ci"></div>
        <div class="ci"></div>
        <div class="ci"></div>
        <div class="ci"></div>
        <div style="clear:both;"></div>
    </div>
    <div>
        <a href="www.bing.com">ha</a>
    </div>
</body>
</html>